For iOS < 13 or deprecated Firefox Fennec on Android, we should be showing the HTML view.
However, we are failing to do that because there is no HTML view due to
which is in our code base since forever.
Including the crawler content so we can fallback to HTML view is expensive, so maybe we want to add old Safari to
so it’s done only when necessary?
The other alternative being telling Babel to transpile replaceAll / finding a good enough polyfill.